I expect this has been asked before but can anyone recommend a non-prescription method of controlling lice that I can use for my GGs?  I asked my vet about spot-on sheep stuff but he wouldn't supply it and I ended up with vet-price louse powder which is only for sprinkling on bedding.  Not making any difference. 
 I also have 'Delete' powder from Goat Nutrition which can be brushed through the coat but with long-haired GGs (and the pregnant one hates being brushed) it is not very effective.  They are both biting and rubbing themselves and I would like to give them some relief from this.
Any ideas?  I am going to my local farm store tomorrow where they will have any non-prescription stuff for cattle and sheep.   I will get whatever will help, as long as it is safe for this late stage of pregnancy, she has 4 weeks to go.